package com.hmdp.utils;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Component;

import java.time.LocalDateTime;
import java.time.ZoneOffset;
import java.time.format.DateTimeFormatter;

@Component
public class RedisIdWorker {

    @Autowired
    private StringRedisTemplate stringRedisTemplate;

    private static final long BEGIN_TIMESTAMP = 1735689600L;

    public long nextId(String prefix) {
        // 生成时间戳 当前秒数 - 2025.1.1-0.0.0
        LocalDateTime now = LocalDateTime.now();
        long nowSecond = now.toEpochSecond(ZoneOffset.UTC);
        long timeStamp = nowSecond - BEGIN_TIMESTAMP;

        // 生成序列号
        String date = now.format(DateTimeFormatter.ofPattern("yyyy:MM:dd"));
        long increment = stringRedisTemplate.opsForValue().increment("icr:" + prefix + ":" + date);

        // 拼接返回
        return timeStamp << 32 | increment;
    }

}
